Liquid-sealed vibration-damping device

Abstract

The present invention provides a liquid-sealed vibration-damping device capable of improving damping performance while preventing increase in size and weight thereof, the liquid-sealed vibration-damping device including: a first attachment member; a second attachment member; an insulator; a vibration-damping unit having a partition member; and a housing space provided in the second attachment member and housing the vibration-damping unit, wherein the second attachment member includes an outer tubular part and a fixing part protruding from the outer tubular part; and a portion of the housing space extends to the fixing part.

I claim: 
     
       1. A liquid-sealed vibration-damping device comprising:
 a first attachment member; 
 a second attachment member; 
 an insulator connecting the first attachment member with the second attachment member; 
 a liquid chamber formed to include an inner space of the insulator, wherein hydraulic liquid is sealed in the liquid chamber; 
 a vibration-damping unit provided with a partition member partitioning the liquid chamber into a primary liquid chamber and a secondary liquid chamber; and 
 a housing space provided in the second attachment member and housing the vibration-damping unit, wherein 
 the second attachment member comprises:
 an outer tubular part, wherein the insulator is directly fixed to the outer tubular part and wherein a top of the liquid chamber includes a top of the inner space of the insulator and extends over an upper surface of a top of the outer tubular part; and 
 a fixing part including an inclined portion extending outward and downward from a vertical outer surface of the outer tubular part, wherein
 a portion of the housing space enters inside the inclined portion to extend outward beyond the vertical outer surface of the outer tubular part, and 
 thereby an overall length of the housing space in an outward direction in which the inclined portion extends is longer than an overall inner length of the outer tubular part, and 
 wherein
 the vibration-damping unit includes an orifice passage communicating the primary liquid chamber with the secondary liquid chamber; and 
 a portion of the orifice passage is disposed in the portion of the housing space extending to the fixing part. 
 
 
 
 
     
     
       2. The liquid-sealed vibration-damping device according to  claim 1 , wherein the outer tubular part is formed in a tubular shape with a substantially rectangular shape in top view along an axis passing a center of the insulator. 
     
     
       3. The liquid-sealed vibration-damping device according to  claim 1 , wherein the portion of the housing space extending to the fixing part is formed to include an inner space region that is outside an axis extending along an outer surface of the outer tubular part.